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22 Commits

Author SHA1 Message Date
gatecat
c74f0d3239 interchange: Don't attempt to import instances as modules 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-07-26 15:36:20 +01:00
Alessandro Comodi
888a2462af interchange: phys: skip only nets writing on disconnected out ports 
Signed-off-by: Alessandro Comodi <acomodi@antmicro.com>
 2021-07-02 16:12:53 +02:00
gatecat
f17643bc08 interchange: Handle case where routing source is a node 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-07-01 13:19:10 +01:00
Alessandro Comodi
dd7cfccbae interchange: phys: do not output nets which have no users 
Signed-off-by: Alessandro Comodi <acomodi@antmicro.com>
 2021-07-01 12:36:05 +02:00
Alessandro Comodi
f9054190fd interchange: fix phys net writer 
Signed-off-by: Alessandro Comodi <acomodi@antmicro.com>
 2021-06-15 14:07:20 +02:00
Alessandro Comodi
104536b7aa interchange: add support for generating BEL clusters 
Clustering greatly helps the placer to identify and pack together
specific cells at the same site (e.g. LUT+FF), or cells that are chained through
dedicated interconnections (e.g. CARRY CHAINS)

Signed-off-by: Alessandro Comodi <acomodi@antmicro.com>
 2021-06-11 11:19:01 +02:00
gatecat
ecc19c2c08 Using hashlib in arches 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-06-02 15:05:19 +01:00
Alessandro Comodi
84359f39c5 interchange: phys: add site instance idstr for pseudo tile PIPs 
Signed-off-by: Alessandro Comodi <acomodi@antmicro.com>
 2021-05-19 18:48:54 +02:00
gatecat
18459a9e4c interchange: Handle disconnected/missing cell pins 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-04-19 10:46:35 +01:00
Keith Rothman
77bc2f9130 Add initial handling of local site inverters and constant signals. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-03-25 17:20:09 -07:00
Keith Rothman
06bcde6243 Correct some bugs in writing of physical netlist w.r.t. site sources. 
Local site sources should have their driving BEL pin included in the net
so that the site wire is driven by an output BEL pin.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-03-22 09:46:43 -07:00
gatecat
23413a4d12 Fix compiler warnings introduced by -Wextra 
Signed-off-by: gatecat <gatecat@ds0.me>
 2021-02-25 15:15:25 +00:00
Keith Rothman
a30043c8da Fix assorted bugs in FPGA interchange. 
Fixes:
 - Only use map constant pins during routing, and not during placement.
 - Unmapped cell ports have no BEL pins.
 - Fix SiteRouter congestion not taking into account initial expansion.
 - Fix psuedo-site pip output.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-02-23 14:09:28 -08:00
Keith Rothman
5574455d2a Working FF example now that constant merging is done. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-02-23 14:09:28 -08:00
Keith Rothman
2fc353d559 Add initial logic for handling dedicated interconnect situations. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-02-23 14:09:28 -08:00
Keith Rothman
15459cae91 Initial working constant network support! 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-02-23 14:09:27 -08:00
Keith Rothman
c21e23b3eb Fix sign mismatch. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-02-18 14:08:22 -08:00
Keith Rothman
5833c90210 Emit fixed attributes to output physical netlist. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-02-17 12:03:17 -08:00
Keith Rothman
7c1544f4d8 Continue fixes. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-02-17 12:03:16 -08:00
Keith Rothman
6f1c835221 Disable traversal limit when reading logical netlist. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-02-17 12:03:16 -08:00
Keith Rothman
6b04fd1524 Small fixes from review. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-02-15 09:54:58 -08:00
Keith Rothman
664407089b Add FPGA interchange frontend and backend. 
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
 2021-02-15 09:54:58 -08:00